package jfilters.filters.color;

/*
    Copyright Janne Liljeblad 2008.

    This file is part of JFilters.

    JFilters is free software: you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation, either version 3 of the License, or
    (at your option) any later version.

    JFilters is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with JFilters.  If not, see <http://www.gnu.org/licenses/>.
*/

import jfilters.filters.SimpleLookUpFilter;

public class JFPosterize extends SimpleLookUpFilter
{
	private int levels = 3;

	public JFPosterize()
	{
		initlookUp();
	}

	public void setLevels( int lvls )
	{
		if (lvls < 2)
			levels = 2;
		else
			levels = lvls;
	}

	protected double lut_func( double value )
	{
		return Math.rint( value * ((double)levels - 1.0)) / ((double) levels - 1.0);
	}

}//end class